Weather alerts in Illinois, January 2021

Weather alerts by county

Each county as a circle sized by its count in January 2021. Tap one for its archive.

Over time

By day

Days in UTC, the clock the archive keeps.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Counties	Lasted
Jan 1, 1:08 AM CST	Mesoscale Discussion	SPC	Bond, Brown, Calhoun, Cass, Champaign, Christian and 43 more	5 hr
Jan 1, 2:33 AM CST	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Greene, Jersey and 4 more	5 hr
Jan 1, 4:02 AM CST	Winter Storm Warning	DVN	Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 2 more	20 hr
Jan 1, 6:35 AM CST	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Cass, Champaign, DeWitt and 34 more	4 hr
Jan 1, 6:01 PM CST	Winter Weather Advisory	ILX	Cass, DeWitt, Fulton, Knox, Logan, McLean and 11 more	6 hr
Jan 2, 10:57 AM CST	River Flood Warning	PAH	Gallatin, Hardin	7 days
Jan 2, 11:14 AM CST	River Flood Warning	ILX	Clay, Richland	47 hr
Jan 2, 2:33 PM CST	Dense Fog Advisory	LSX	Adams, Brown, Pike	21 hr
Jan 2, 2:49 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	21 hr
Jan 2, 3:04 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, Grundy, Kane, Kendall, LaSalle and 5 more	20 hr
Jan 2, 3:49 PM CST	Dense Fog Advisory	ILX	Cass, Fulton, Knox, Logan, McLean, Marshall and 10 more	18 hr
Jan 3, 1:35 AM CST	Winter Weather Advisory	ILX	Champaign, DeWitt, Douglas, Logan, Macon, Moultrie and 3 more	4 hr
Jan 3, 1:55 PM CST	Dense Fog Advisory	LSX	Adams, Brown, Calhoun, Fayette, Greene, Jersey and 7 more	30 hr
Jan 3, 2:22 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	28 hr
Jan 3, 2:38 PM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Coles, Cumberland and 24 more	32 hr
Jan 3, 3:37 PM CST	Dense Fog Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 11 more	29 hr
Jan 4, 5:30 AM CST	Dense Fog Advisory	PAH	Jackson	5 hr
Jan 4, 3:27 PM CST	Special Weather Statement	DVN	Jo Daviess, Mercer, Rock Island	2 hr
Jan 5, 3:18 PM CST	Dense Fog Advisory	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	19 hr
Jan 5, 3:27 PM CST	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Coles, DeWitt, Douglas and 21 more	17 hr
Jan 5, 3:41 PM CST	Dense Fog Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	18 hr
Jan 5, 7:17 PM CST	Dense Fog Advisory	LSX	Adams, Brown, Fayette, Greene, Macoupin, Montgomery and 1 more	13 hr
Jan 6, 2:32 PM CST	Dense Fog Advisory	ILX	Fulton, Knox, Peoria, Stark	7 hr
Jan 6, 2:37 PM CST	Dense Fog Advisory	DVN	Carroll, Hancock, Henderson, Henry, Jo Daviess, McDonough and 5 more	13 hr
Jan 7, 10:05 PM CST	Small Craft Advisory	LOT		35 hr
Jan 13, 2:53 PM CST	Winter Weather Advisory	DVN	Carroll, Jo Daviess, Stephenson	44 hr
Jan 14, 2:33 PM CST	Winter Weather Advisory	LSX	Madison, Monroe, Saint Clair	29 hr
Jan 15, 3:52 PM CST	Small Craft Advisory	LOT		35 hr
Jan 15, 10:33 PM CST	Dense Fog Advisory	LOT	Cook, Grundy, Kankakee, Kendall, Will	4 hr
Jan 16, 8:33 PM CST	Winter Weather Advisory	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more	15 hr
Jan 18, 3:20 AM CST	Winter Weather Advisory	LSX	Bond, Calhoun, Fayette, Greene, Jersey, Macoupin and 2 more	19 hr
Jan 18, 3:27 AM CST	Winter Weather Advisory	ILX	Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 3 more	18 hr
Jan 19, 2:49 AM CST	Small Craft Advisory	LOT		38 hr
Jan 19, 4:59 AM CST	Winter Weather Advisory	DVN	Henderson, Mercer, Rock Island, Warren	5 hr
Jan 19, 2:54 PM CST	Small Craft Advisory	LOT		26 hr
Jan 19, 5:03 PM CST	Winter Weather Advisory	DVN	Bureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more	4 hr
Jan 20, 5:05 PM CST	Gale Warning	LOT		7 hr
Jan 20, 5:05 PM CST	Small Craft Advisory	LOT		58 hr
Jan 20, 10:01 PM CST	Gale Warning	LOT		119 min
Jan 20, 10:01 PM CST	Small Craft Advisory	LOT		35 hr
Jan 23, 3:44 PM CST	Winter Storm Watch	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	23 hr
Jan 23, 4:00 PM CST	Small Craft Advisory	LOT		18 hr
Jan 24, 3:05 AM CST	Winter Storm Watch	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	12 hr
Jan 24, 3:58 AM CST	Winter Storm Watch	ILX	Fulton, Knox, Marshall, Mason, Peoria, Schuyler and 3 more	11 hr
Jan 24, 1:05 PM CST	Winter Weather Advisory	LSX	Adams, Brown	41 hr
Jan 24, 2:43 PM CST	Winter Storm Warning	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more	45 hr
Jan 24, 2:43 PM CST	Winter Weather Advisory	DVN	Bureau, Hancock, Henderson, McDonough, Putnam, Warren	45 hr
Jan 24, 2:48 PM CST	Gale Watch	LOT		6 hr
Jan 24, 2:55 PM CST	Winter Storm Warning	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	48 hr
Jan 24, 2:55 PM CST	Winter Weather Advisory	LOT	Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 3 more	48 hr
Jan 24, 3:06 PM CST	Winter Storm Warning	ILX	Knox, Marshall, Stark	37 hr
Jan 24, 3:06 PM CST	Winter Weather Advisory	ILX	Cass, Champaign, Christian, Clark, Coles, Crawford and 23 more	21 hr
Jan 24, 3:08 PM CST	Lakeshore Flood Advisory	LOT	Cook, Lake	45 hr
Jan 24, 8:53 PM CST	Gale Warning	LOT		30 hr
Jan 24, 8:53 PM CST	Small Craft Advisory	LOT		4 days
Jan 25, 10:11 AM CST	Areal Flood Advisory	PAH	Alexander, Pulaski	5 hr
Jan 25, 11:47 AM CST	Winter Weather Advisory	ILX	Cass, Champaign, Christian, DeWitt, Douglas, Edgar and 19 more	24 hr
Jan 25, 9:24 PM CST	Dense Fog Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	12 hr
Jan 26, 3:03 AM CST	Small Craft Advisory	LOT		54 hr
Jan 26, 8:19 PM CST	Winter Weather Advisory	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	19 hr
Jan 26, 8:48 PM CST	Winter Weather Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	25 hr
Jan 27, 2:37 AM CST	Winter Weather Advisory	LOT	Cook	11 hr
Jan 27, 12:05 PM CST	Winter Weather Advisory	LSX	Adams, Brown, Pike	115 min
Jan 29, 2:11 AM CST	Winter Storm Watch	DVN	Bureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more	12 hr
Jan 29, 3:20 AM CST	Small Craft Advisory	LOT		5 days
Jan 29, 3:23 AM CST	Winter Storm Watch	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more	24 hr
Jan 29, 3:43 AM CST	Winter Storm Watch	ILX	Marshall, Stark	11 hr
Jan 29, 12:07 PM CST	River Flood Advisory	LOT	Winnebago	21 hr
Jan 29, 2:22 PM CST	Gale Warning	LOT		43 hr
Jan 29, 2:22 PM CST	Small Craft Advisory	LOT		4 days
Jan 29, 2:29 PM CST	Winter Storm Warning	DVN	Bureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more	46 hr
Jan 29, 2:29 PM CST	Winter Weather Advisory	DVN	Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more	52 hr
Jan 29, 2:38 PM CST	Winter Storm Warning	LOT	Boone, Cook, DeKalb, DuPage, Grundy, Iroquois and 10 more	51 hr
Jan 29, 2:43 PM CST	Lakeshore Flood Advisory	LOT	Cook, Lake	60 hr
Jan 29, 2:48 PM CST	Winter Weather Advisory	ILX	Champaign, DeWitt, Knox, McLean, Marshall, Peoria and 5 more	48 hr
Jan 30, 3:27 AM CST	Winter Weather Advisory	LOT	Boone, DeKalb, Ford, LaSalle, Lee, Livingston and 2 more	39 hr
Jan 30, 9:30 AM CST	River Flood Warning	LSX	Fayette	71 hr
Jan 30, 6:23 PM CST	Mesoscale Discussion	SPC	Bureau, Carroll, DeKalb, DuPage, Grundy, Kane and 7 more	4 hr
Jan 30, 9:28 PM CST	River Flood Warning	ILX	Clay, Richland	7 days
Jan 31, 9:04 AM CST	River Flood Warning	ILX	Lawrence	59 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Mesoscale Discussion	4
Special Weather Statement	1
Flooding
River Flood Warning	5
Areal Flood Advisory	1
River Flood Advisory	1
Winter
Winter Storm Warning	6
Winter Storm Watch	6
Winter Weather Advisory	21
Fog and smoke
Dense Fog Advisory	17
Coast and beach
Lakeshore Flood Advisory	2
Marine
Gale Warning	4
Gale Watch	1
Small Craft Advisory	11

By county

Every county with at least one alert. A county page lists each alert that covered it.

62 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2020 2022

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.